CVE-2026-41034
Medium
Description
ONLYOFFICE DocumentServer before 9.3.0 has an untrusted pointer dereference in XLS processing/conversion (via pictFmla.cbBufInCtlStm and other vectors), leading to an information leak and ASLR bypass.
SeverityMedium
CVSS5.0
Exploit probability—
ProductONLYOFFICE DocumentServer
PublishedApr 16, 2026
First seenApr 16, 2026
Weakness typeCWE-125Out-of-bounds read
How to fix
Update
- Ascensio ONLYOFFICE DocumentServer9.3.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Ascensio ONLYOFFICE DocumentServer | v < 9.3.0 | 9.3.0 |
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